package com.tuzhi.base.web.util;

import com.tuzhi.util.CharsetKit;
import com.tuzhi.util.NumberTzUtil;
import com.tuzhi.util.ObjectTzUtil;
import com.tuzhi.util.StringTzUtil;
import org.apache.commons.collections.CollectionUtils;
import org.apache.commons.lang3.StringUtils;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.web.context.request.RequestAttributes;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.net.URLDecoder;
import java.net.URLEncoder;
import java.util.List;

/**
 * 客户端工具类
 */
public class ServletUtil {
    /**
     * 获取String参数
     */
    public static String getParameter(String name) {
        return getRequest().getParameter(name);
    }

    /**
     * 获取String参数
     */
    public static String getParameter(String name, String defaultValue) {
        return StringTzUtil.defaultIfBlank(getRequest().getParameter(name), defaultValue);
    }

    /**
     * 获取Integer参数
     */
    public static Integer getParameterToInt(String name) {
        return NumberTzUtil.createInteger(getRequest().getParameter(name));
    }

    /**
     * 获取Integer参数
     */
    public static Integer getParameterToInt(String name, Integer defaultValue) {
        return NumberTzUtil.toInt(getRequest().getParameter(name), defaultValue);
    }

    /**
     * 获取Boolean参数
     */
    public static Boolean getParameterToBool(String name) {
        return ObjectTzUtil.toBool(getRequest().getParameter(name));
    }

    /**
     * 获取Boolean参数
     */
    public static Boolean getParameterToBool(String name, Boolean defaultValue) {
        return ObjectTzUtil.toBool(getRequest().getParameter(name), defaultValue);
    }

    /**
     * 获取request
     */
    public static HttpServletRequest getRequest() {
        return getRequestAttributes().getRequest();
    }

    /**
     * 获取response
     */
    public static HttpServletResponse getResponse() {
        return getRequestAttributes().getResponse();
    }

    /**
     * 获取session
     */
    public static HttpSession getSession() {
        return getRequest().getSession();
    }

    public static ServletRequestAttributes getRequestAttributes() {
        RequestAttributes attributes = RequestContextHolder.getRequestAttributes();
        return (ServletRequestAttributes) attributes;
    }

    /**
     * 将字符串渲染到客户端
     *
     * @param response 渲染对象
     * @param string   待渲染的字符串
     */
    public static void renderJson(HttpServletResponse response, String string) {
        try {
            response.setStatus(200);
            response.setContentType("application/json");
            response.setCharacterEncoding("utf-8");
            response.getWriter().print(string);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    /**
     * 是否是Ajax异步请求
     *
     * @param request
     */
    public static boolean isAjaxRequest(HttpServletRequest request) {
        String accept = request.getHeader("accept");
        if (accept != null && accept.contains("application/json")) {
            return true;
        }

        String xRequestedWith = request.getHeader("X-Requested-With");
        if (xRequestedWith != null && xRequestedWith.contains("XMLHttpRequest")) {
            return true;
        }

        String uri = request.getRequestURI();
        if (StringTzUtil.inIgnoreCase(uri, ".json", ".xml")) {
            return true;
        }

        String ajax = request.getParameter("__ajax");
        return StringTzUtil.inIgnoreCase(ajax, "json", "xml");
    }

    /**
     * 内容编码
     *
     * @param str 内容
     * @return 编码后的内容
     */
    public static String urlEncode(String str) {
        try {
            return URLEncoder.encode(str, CharsetKit.UTF_8);
        } catch (UnsupportedEncodingException e) {
            return StringUtils.EMPTY;
        }
    }

    /**
     * 内容解码
     *
     * @param str 内容
     * @return 解码后的内容
     */
    public static String urlDecode(String str) {
        try {
            return URLDecoder.decode(str, CharsetKit.UTF_8);
        } catch (UnsupportedEncodingException e) {
            return StringUtils.EMPTY;
        }
    }

    public static String getHeader(ServerHttpRequest request, Object key) {
        List<String> list = request.getHeaders().get(key);
        if (CollectionUtils.isNotEmpty(list)) {
            return list.get(0);
        }
        return null;
    }

    public static String getHeader(HttpServletRequest request, String key) {
        return request.getHeader(key);
    }

    public static Long getHeader4Long(ServerHttpRequest request, Object key) {
        String valStr = getHeader(request, key);
        if (StringUtils.isNotBlank(valStr) && NumberTzUtil.isNumeric(valStr)) {
            return Long.valueOf(valStr);
        }
        return null;
    }

    public static Long getHeader4Long(HttpServletRequest request, String key) {
        String valStr = getHeader(request, key);
        if (StringUtils.isNotBlank(valStr) && NumberTzUtil.isNumeric(valStr)) {
            return Long.valueOf(valStr);
        }
        return null;
    }
}
